Packing-ring.



i To all whom 'it nung/concern insignia.

ITED isriirgrstrgnn'r OFFICE.

EDWARD 1B. CAMPBELL 0F sr. LOUIS, MISSOURI.

Be itllinownthatl, lliiwmn BJCAMriii-im.,

"la citizen ot the United States, residing at tion. y

fthe citv oivSt.` Louis and State ofiMissoui'i,

have invented a new. and useful Packing n tingifoi which the following is a specifica- Thisinvention relates to packing `rings ior reciprocating pistons. andit consists of two resilient open rings provided with.;u novel .coi'iperating structural features whereby each` ring positively prevents 'fouling of i*the ends oi' the other ring with the ports of `fthe cylinder during the reciprocation of the `pistongand it consists further of novel co operating features for holding tlietwo rings in `propel" adpistn'ient with` `respect to'each i Yother;` and itconsists further in the combipanded by the pressure ot the gas or actuiia'tion of iiiipioved packing rings with the pistonso that the packing rings are eX- atingv fluid within the inner `packingring ieilectivelyto press the peripheries oit" both iackinr riiins closelv au'aiiistthe interior ot' the (.fylinderthe packing rings being ar- `.ranged to art in the manner ot' a valve to prevent escape ot' the gas or actuating fluid y'across or beyond` the parking rings.

An object ot' the inventionfis toprovide. an improved packing. comprising two ringsi ot' the o ien resilient tv ie.,one of which is 'irovided with a iortioii ada )ted to o ierate l 'l against the sui-'tace oiE the. cylinder, which- 4portion is provided with an oblique wall on one side,` said. ring `being also provided with :a thinner portion having a; iieripheral ridge.

V l `the `other `ring froiiiifouling with the ports in combination with another ring encircling tlieithinncr `portion of the iirst-named ring `i and having an oblique `\`vall'on one edge w40 on `tl`i`e` side ot' the `first-named ring;V and adapted to coi'iperatewithlthe ,oblique wall also having an interior groove receiving ,the peripheral,ridge on said vErst-'named ring whereby cachot' said two rings constitutes a positive retainer for preventing' the ends ot'` ofthe cylinder during reciprocation of the piston.

Another object is to providean improved packing comprising two telescopingor overlapping rings, `the inner one; of which is provided with an exterior projecting portion which is received within at corresponding recess in the outerringi whereby the two rings are'retainedfin proper adjustment, one

Yspecification of Letters Patent.

y `Application filed June 16, 1915. Serial No. 34,522.

PACKING-RING.

Patented May 2, 1916.

oi' said rings also having a groove receiving an extended portion of the other ring whereby the ends of both rings are prevented from becoiningiouled in the -`ports on the cylinder. y i

A further object is to provide in combinationwith a piston having a circumferential groove, an improved packing comprising two open resilient rings seated in `said groove ind arranged so that the gas or ac tuating fluid passing between the piston and the wall of the cylinder will enter the groove 4in which said rings are seated and, passing 'having a reciprocating piston mounted' therein. and illustrating a number ofmy improved packings mounted on saidpiston. Fig. l is a view illustrating the cylinder and a part of the piston and one of the packings on tlie piston in section, clearly illustrating the position ot' the rings when per forming the functions of a valve under control Voi the gas or actuating Huid. Fig. 3 is a view of the packing illi'istrating the two ringsv in assembled adjustment detached'- from the piston. llig. l is a sectional view ot the two rings in assembled adjustment. Fig.' 5 is an enlargedsectional view illustrating the construction of the twovrings by which n passage for a lubricant is provided. Fig. 6 is a similar sectional view illustrating the abutment carried by one of the rings for limiting the relative movement of the two rings.

The piston 1* is of thl usual reciprocatin i type. 'and operates within a cylinder 2,- an,

is provided with a piston rod 3 pivotally connected to the piston at 4, whereby the power of the pistonis transmitted to theA driving mechanism. The piston 1 is'pro-y vided with a number of circumferential grooves 5. A packing is to be mounted in each of the circumferential grooves and to reciprocate with the piston in the oper- /ation of the engine. It willbe understood' that the piston is to be equipped with a plurality of packings. and I have illustrated the piston in Fig. 1 as being equipped with three packings. Each packing is composed 'of two cooperating rings.'one of which includes an outer portion 6 the periphery ot which is adapted to pressv and operate against the interior ofl the cylinder. The ring including the outer portion also in chicles an inner portion T, which may be described as a. laterally extending annular flange whose interior diameter is the same as the interior diameter of the part (i and whose exterior diameter is less than the exoblique wall S and the outer wall of the part terior dia-meter ofsaid part G. The part (i 'has an oblique wall S at the .side from which the inner portion 7 extends. so that there is an annular groove or channel between the 7. The part 'T is provided with an annular ridge or rib 9..Y so that the periphery of saidl part lTineludes two oblique walls both til".

which extend obliquely toward the a .vis of the ring from the summit or apex of the ridge or ribS), as will be clearly understood by reference to Figs. 5 and 6. The coperating ring 11 is also of the resilient open type and is adapted to encircle or telescope linterior channel or groove which receives come vseparated or detached.

the ring 1l which is toward the ring parti? `upon the part T of the ring above described. so that the side edge l2 of said ring 1l is in the saine plane with the sideedge 13 of the part 7. The ring 11 is formed with an the ridge or rib 9 on the part 7. so that when rthe two rings are placed together, one within the other in the manner illustrated. the ridge or rib 9 being received within the groove or channel holds the two rings. in

proper adjustment so that they cannotv he.-

The side of has an oblique wall l5 adapted to engage or ahnt against the oblique vall 8. There is thus formed a flange 1G on the ring 11.

which fiangel is received within the groove i or channel between the oblique wall S and the/ring part 7. lt is obvious that by this construction the ends ot' the ring 1] will be positively held within the same arcuate vrigid with the ringrpart 7 and'which ex tends between the ends of the ring 11, thus limiting movement of the two rings. and preventing the two rings from working around so vthat the openfends thereof are brought together.

In the combination ot' the packing with the piston it is preferable thatthe groove 5 be slightly wider than thev packing. so that the packing may have slight movement within the groove. This will be clearly understood by reference to Fig. 2, which illustrates the position of the packing in the groove which is adjacent to the end of 4 the cylinder. The parts are illustrated in Fig. 2 in the position which they occupy when the piston is moving toward compression. during which movement the packing is pressed closely against the'wall ot' the groove whichv is farthest from the end of the piston. The packing is iiiounted on the piston with the ring part 6 toward the endl of the piston. so that the open space between the ends of the ring (--T foi-ins a passage for the admission of the gas into the groove 5 between the inner wall ot said groove and the inner wall of the ring (3-7. Obviously.

the t'rictional contact of the packing with' the interior of the cylinder will force the `packing against the wall of the groove which is Jfarthest from the end ot' the pistou. thus forming a hermetic sea-l to preveiitthc gas or actuating fluid trornescapiiig t'roiu the groove The pressure of the gas or actuating fluid within the groove 5 and against the inner wall ot' the ring 6T increases asthe compression lis increased by the movement ot the piston. Thus tliegas or actuating fluid is utilized and the increasing pressure thercof increases the pressure of the packing against the cylinder and against the rear wall of the groove in which the packing is mounted.

The cooperating walls 8 and 15 are preferably formed inr different planes of obliquity. so that there may be formed a small space between the adiacent side walls of the ring part andthe ring 11 for, the passage of a lubricant between said rings to prevent ladhesion thereof as aresult of any accumii lations of carbon or other substances. The ring 11 will be enabled toseparate slightly from the outer wall of the ringpart 7,`th'us permitting passage of the lubricant between all adjacent walls of the two rings. It will he understood that the movementof the two rings with respect to eachother is not siiflicient to remove the flange 16 from the groove in which it is seated, so that the ends of the ring 11 will be: prevented fromV becoming caughtv or fouled in the cylinder ports.

It will be understood that there may be various alterations and modifications ,in the construction ofthe packing withoutdeparture from the spirit; and scope of the invenytion. ,I do not/restrict myself to exact feaa ring encircling said laterally extending.

portion and having a projection engaging under said oblique wall, whereby the ends of said second-namedring are held in the same annular plane with the periphery of said first-named ring part, and means in rigid connection with said laterally extending portion holding said second-named ring in position so that the side wall thereof` opposite from said projection is in substan' tially the same plane as the side wall of said laterally extending portion of saidl first-A named ring. y

2. A packing, comprising a ring, a laterally extending portion integral with said ring, there being a groove between saidl ring and said laterally extending portion, a second ring encircling said laterally extending portion, a projection on said second ring engaging in said groove whereby outward pressure of said second ring is imparted to said first-named ring, means limiting lateral movement of said two rings with respect to eachother, and means limiting rotary movement of said rings with respect to each other.

3. A packing.' comprising a ring having an oblique`wal'l on one side thereof, a laterally extending portion integral with said ring on the same side as said oblique wall.

a rib encircling said laterally extending por` tion between said wall and the side of said .laterally extending portion, a second rlng encircling said laterally extending portion 4and having an interior groove receiving said rib, a passage for a lubricant between said rings, and means limiting rotary movement of said rings with respect to .each other.

4. The combination with a piston having acircumferential groove therein, and a cylinder in which said piston is operatively mounted, of a ring of the resilient open type of less width than said said groove, whereby tie actuating fluid may enter said groove between the open ends of said ring and press said ring against the cylinder, a second ring encircling a part of said first-named ring and extending across the space between the open ends of said first-named ring at one side of said first-named ring and bearing against the side wall of said groove effectively to pre- -vent the passage of the actuating luid from said groove, means wherebyf the periphery of each ring is held in annular alinement with the other ring, and means limiting relative rotation of said two rings.

5. A packing, comprising a ring, a laterally extending portion `integral with said ring and being of less diameter than'said ring` a -rib encircling said laterally extend` ing portion. a second ringencircling said laterally extending portion and having an interior groove. receiving said rib whereby said second ring is held with its side wall approximately in the same plane as the side wall, of said laterally extending portion, means whereby the periphery of each ring is held in annular alinement with the other ring, and an abutment on one of said rings limiting relative rotation of said rings.

ln witness whereof, l have signed this specification in the presence of two subscribing witnesses. v

EDWARD B. CAMPBELL.

lVitnesses:

N. (l: BUTLER, .lonN D. RIPrnY.

groove mounted inl 

